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2. Virginia Graeme Baker Pool and Spa Safety Act - Wikipedia

   en.wikipedia.org/wiki/Virginia_Graeme_Baker_Pool...

   A pool contractor should verify that the pool and/or spa is in compliance with the federally mandated Virginia Graeme Baker Pool & Spa Safety Act which takes effect December 19, 2008. If the pool is not in compliance, the necessary steps should be taken to comply with the Act, which, in essence, specifies that:

3. Scaffolding - Wikipedia

   en.wikipedia.org/wiki/Scaffolding

   The diagram above also shows a kicker lift, which is just 150 mm or so above the ground. Transom spacing is determined by the thickness of the boards supported, 38 mm boards require a transom spacing of no more than 1.2 m while a 50 mm board can stand a transom spacing of 2.6 m and 63 mm boards can have a maximum span of 3.25 m.

4. Retaining wall - Wikipedia

   en.wikipedia.org/wiki/Retaining_wall

   The structure is constructed to resist the lateral pressure of soil when there is a desired change in ground elevation that exceeds the angle of repose of the soil. [ 1 ] A basement wall is thus one kind of retaining wall; however, the term usually refers to a cantilever retaining wall, which is a freestanding structure without lateral support ...

5. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   H-beam sections (typical column sections, due to resistance to bending in all axis) may be driven at angles "raked" to rock or other firmer soils; the H-beams are left extended above the base. A reinforced concrete plug may be placed under the water, a process known as tremie concrete placement. When the caisson is dewatered, this plug acts as ...

7. What's in our names? How our streets and landmarks tell our ...

   www.aol.com/whats-names-streets-landmarks-tell...

   The concrete markers also caused more damage than metal posts when struck by cars and presented maintenance problems: "Every two to three years we had to repaint them and re-stencil the street ...